在代码中修改TextView的DrawableRight图片

<TextView  

android:id="@+id/textciew1"  

android:layout_width="match_parent"  

android:layout_height="wrap_content"  

android:background="#000"  

android:drawableRight="@drawable/button_nav_down"  

android:gravity="center_vertical"  

android:paddingLeft="16dp"  

android:paddingRight="16dp"  

android:text="展开"  

android:textColor="#fff"  />  

 

Drawable nav_up=getResources().getDrawable(R.drawable.button_nav_up);  

nav_up.setBounds(0, 0, nav_up.getMinimumWidth(), nav_up.getMinimumHeight());  

textview1.setCompoundDrawables(null, null, nav_up, null);